CN108296143B - Low-temperature efficient drying system for water-based paint - Google Patents
Low-temperature efficient drying system for water-based paint Download PDFInfo
- Publication number
- CN108296143B CN108296143B CN201711354338.7A CN201711354338A CN108296143B CN 108296143 B CN108296143 B CN 108296143B CN 201711354338 A CN201711354338 A CN 201711354338A CN 108296143 B CN108296143 B CN 108296143B
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- condenser
- air
- evaporator
- water
- refrigerant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0403—Drying webs
- B41F23/0423—Drying webs by convection
- B41F23/0426—Drying webs by convection using heated air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/0463—Drying sheets, e.g. between two printing stations by convection
- B41F23/0466—Drying sheets, e.g. between two printing stations by convection by using heated air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0018—Protection means against injury to the operator
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a low-temperature efficient drying system for water-based paint, which comprises a drying box, an evaporator, an exhaust fan, a condenser A and an air inlet fan which are sequentially connected, wherein the air inlet fan is also connected with the drying box, and a compressor is arranged between the condenser A and the evaporator. The system can realize high-efficiency and energy-saving base material coating and drying.
Description
Technical Field
The invention belongs to the technical field of gravure press drying, and relates to a low-temperature efficient drying system for water-based paint.
Background
At present, in the equipment such as a unit type gravure printing machine, a dry compounding machine, a coating machine, a flexographic printing machine and the like, a drying oven is needed to dry the surface of a product by high-temperature hot air in a production process so as to volatilize solvent components coated on the surface of the product, and most of traditional drying heat sources are electricity, steam, heat conduction oil and natural gas. Due to the requirements of environmental protection and green production, enterprises gradually start to use water-based coatings as printing ink and glue for production.
Printing machine, compounding machine, coating machine, drying system is the biggest part of power consumption in the complete machine operation. The water-based paint is a mixture of water and ethanol, 70 to 100 percent of water is mixed with 30 to 0 percent of ethanol, the enthalpy value of the water is far higher than that of other volatile organic compounds used as solvents, the heat and air quantity required by the general drying process are large, and the emissions of VOCs caused by alcohol emissions exceed the national standard, so the following problems are caused: 1. the system has high energy consumption during operation, and the production cost is seriously influenced; 2. because of the requirement for large air volume, a longer drying channel is needed; 3. the production speed is influenced, so that the efficiency of production equipment is reduced; and 4, the discharge of the VOCs does not reach the standard.
Disclosure of Invention
The invention aims to provide a low-temperature efficient drying system for water-based paint, which can realize efficient and energy-saving coating and drying of a base material.
The invention adopts the technical scheme that the low-temperature high-efficiency drying system for the water-based paint comprises a drying box, an evaporator, an exhaust fan, a condenser A and an air inlet fan which are sequentially connected, wherein the air inlet fan is also connected with the drying box, and a compressor is arranged between the condenser A and the evaporator.
The present invention is also characterized in that,
a gas-water separator is also arranged between the evaporator and the air exhaust fan.
The evaporator and the gas-water separator are both connected with the liquid collecting tank.
A three-way air mixing valve is arranged between the exhaust fan and the condenser A, a connector of the air mixing valve is communicated with an air outlet of the exhaust fan, a connector II of the air mixing valve is communicated with the condenser A, and a connector III of the air mixing valve is communicated with the external ambient air.
Still be equipped with condenser B between condenser A and the evaporimeter, the refrigerant export of evaporimeter is through compressor and condenser B's refrigerant inlet connection, condenser B's refrigerant exit linkage condenser A's refrigerant import, condenser A's refrigerant exit linkage evaporimeter's refrigerant import, is equipped with the choke valve between evaporimeter and the condenser A connecting line.
The invention has the following beneficial effects:
1. the system is connected with the evaporator through the air outlet of the drying box, and condenses and recovers the air containing the water-based paint from the drying box, so that the discharge amount of the alcohols VOCs discharged from the drying box is less than 50mg/m3；
2. The system improves the drying rate of the water-based paint by more than 80 percent;
3. the drying temperature of the drying box of the system is reduced by more than 50 percent;
4. the independent system provided by the invention can meet all production requirements of one drying box without other engineering conditions, and realizes that the discharge of VOCs reaches the standard.
Drawings
FIG. 1 is a schematic structural diagram of a low-temperature high-efficiency drying system for water-based paint.
In the figure, 1, a drying box, 2, an evaporator, 3, an exhaust fan, 4, a condenser A, 5, an intake fan, 6, a gas-water separator, 7, a liquid collecting tank, 8, an air mixing valve, 9, a condenser B, 10, a compressor and 11, a throttle valve are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a low-temperature high-efficiency drying system for water-based paint, which is structurally shown in figure 1 and comprises a drying box 1, an evaporator 2, an exhaust fan 3, a condenser A4 and an air inlet fan 5 which are sequentially connected, wherein the air inlet fan 5 is also connected with the drying box 1, and a compressor 10 is arranged between the condenser A4 and the evaporator 2.
A gas-water separator 6 is also arranged between the evaporator 2 and the exhaust fan 3.
The evaporator 2 and the gas-water separator 6 are both connected with a liquid collecting tank 7.
A three-way air mixing valve 8 is arranged between the exhaust fan 3 and the condenser A4, a first interface of the air mixing valve 8 is connected with an air outlet of the exhaust fan 3, a second interface of the air mixing valve 8 is communicated with the condenser A4, and a third interface of the air mixing valve 8 is communicated with the external ambient air.
A condenser B9 is further arranged between the condenser A4 and the evaporator 2, the condenser B9 is connected with the exhaust fan 3, part of air sent by the exhaust fan 3 is used as a working medium in the condenser B9, a refrigerant outlet of the evaporator 2 is connected with a refrigerant inlet of the condenser B9 through the compressor 10, a refrigerant outlet of the condenser B9 is connected with a refrigerant inlet of the condenser A4, a refrigerant outlet of the condenser A4 is connected with a refrigerant inlet of the evaporator 2, and a throttle valve 11 is arranged between connecting pipelines of the evaporator 2 and the condenser A4.
The working process of the low-temperature high-efficiency drying system for the water-based paint comprises the following steps: air is fed into a three-way condenser A4 at an interface of an air mixing valve 8, the air is heated in a condenser A4 and then fed into a drying box 1 through an air inlet fan 5 to dry a material film in the drying box 1, exhaust air in the drying box 1 is fed into an evaporator 2 to be cooled, when the temperature of the exhaust air is reduced to be below an alcohol dew point, the exhaust air is condensed into liquid and then fed into a liquid collecting tank 7, and a gas-water separator 6 further dries the separated exhaust air;
the low-temperature gas from the gas-water separator 6 is partially sent into the condenser A4 through the exhaust fan 3, and the other part of the air from the exhaust fan 3 is used as the working medium of the condenser B9 and then is discharged into the outside air through the condenser B9. The condenser B9 is used to assist in cooling the refrigerant in the evaporator 2, so that the refrigerant in the evaporator 2 can absorb more heat, and the temperature of the air entering the evaporator 2 is reduced faster.
Because the air from the drying box 1 can carry the coating particles on the material film, the main component of the coating particles is alcohol, the air from the drying box 1 enters an evaporator B2, the coating particles are condensed into liquid in an evaporator B2, and finally collected in a liquid collecting tank 7 for recovery; the air from the evaporator B2 enters into a gas-water separation 6 for further drying, so that the relative humidity of the air is below 0-20%, the inlet air of the drying box 1 is in a sufficiently dry state, and the volatilization speed of the water-based paint is improved.
Claims (1)
1. The low-temperature efficient drying system for the water-based paint is characterized in that: the air-conditioning system comprises a drying box (1), an evaporator (2), an exhaust fan (3), a condenser A (4) and an air inlet fan (5) which are connected in sequence, wherein the air inlet fan (5) is also connected with the drying box (1), and a compressor (10) is arranged between the condenser A (4) and the evaporator (2);
a gas-water separator (6) is also arranged between the evaporator (2) and the exhaust fan (3);
the evaporator (2) and the gas-water separator (6) are both connected with a liquid collecting tank (7);
a three-way air mixing valve (8) is arranged between the exhaust fan (3) and the condenser A (4), the interface of the air mixing valve (8) is communicated with the air outlet of the exhaust fan (3), the interface II of the air mixing valve (8) is communicated with the condenser A (4), and the interface III of the air mixing valve (8) is communicated with the outside environment air;
still be equipped with condenser B (9) between condenser A (4) and evaporimeter (2), the refrigerant export of evaporimeter (2) is through the refrigerant access connection of compressor (10) and condenser B (9), and the refrigerant import of the refrigerant exit linkage condenser A (4) of condenser B (9), the refrigerant import of the refrigerant exit linkage evaporimeter (2) of condenser A (4), is equipped with choke valve (11) between evaporimeter (2) and condenser A (4) connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711354338.7A CN108296143B (en) | 2017-12-15 | 2017-12-15 | Low-temperature efficient drying system for water-based paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711354338.7A CN108296143B (en) | 2017-12-15 | 2017-12-15 | Low-temperature efficient drying system for water-based paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108296143A CN108296143A (en) | 2018-07-20 |
| CN108296143B true CN108296143B (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711354338.7A Active CN108296143B (en) | 2017-12-15 | 2017-12-15 | Low-temperature efficient drying system for water-based paint |
Country Status (1)
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| CN (1) | CN108296143B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110027317A (en) * | 2019-05-06 | 2019-07-19 | 魏毅培 | Aqueous ink print air circulation system and VOC discharge-reducing method |
| CN115257164A (en) * | 2022-07-20 | 2022-11-01 | 上海东星环保油墨有限公司 | Printing processing system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5751857B2 (en) * | 2011-02-22 | 2015-07-22 | キヤノン株式会社 | Recording device |
| CN203901942U (en) * | 2014-06-20 | 2014-10-29 | 厦门山川材料科技有限公司 | Drying system of energy saving type water-based ink photogravure press |
| CN204398510U (en) * | 2015-01-05 | 2015-06-17 | 烟台市红星彩印有限公司 | A kind of water color ink printing machine drying device |
| CN204513991U (en) * | 2015-04-03 | 2015-07-29 | 西安永创节能设备有限公司 | The high temperature heat pump printing drying system that a kind of Inner eycle secondary recovery utilizes |
| CN206410476U (en) * | 2016-12-30 | 2017-08-15 | 维克（天津）有限公司 | A kind of twin-stage high-temperature dehumidification drying plant |
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- 2017-12-15 CN CN201711354338.7A patent/CN108296143B/en active Active
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| Publication number | Publication date |
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| CN108296143A (en) | 2018-07-20 |
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